Todays Washington Post has a column by Mark Stricherz on "Casey Democrats," thus described:

Like [former Pennsylvania Governor] Casey, these voters -- blue-collar and religious, often Catholic -- are liberal on economic issues but conservative on cultural ones. Where they once looked to union leaders and their fellow union members for political guidance, they now look to their religious leaders and fellow churchgoers. And in the last decade, to the dismay of Democratic strategists, they've been voting for Republican presidential candidates. According to Democratic pollster and strategist Stan Greenberg, they made up the 10 percent of white Catholics who identify with the Democrats but didn't vote for Sen. John F. Kerry for president in 2004. And if Sen. Barack Obama can't do better with the Casey Democrats, his presidential bid may fare no better than Kerry's.